Art of striping paper



Aug. 14, 1928. w 1,680,711

E. B. WESTON ET AL ART OF STRIPING PAPER Filed July 1926 INVENTORS fanmm 5. row I /6 1; I5 I im/M6. A

Patented Aug. 14, 1928.

UNITED STATES PATENT OFFICE.

EDWARD'B. WESTON, F DAYTON, OHIO, AND WILLIAM G. CLARK, OF TEBREHA'U'IE,

INDIANA, ASSIGNORS TO THE WESTON PAPER AND MFG. 00., O1 DAYTON, OHIO, A

ART OF STRIIING PAIEB.

Application filed July 8, 1926. Serial No. 120,837.

Our invention relates to the art of striping paper and includesmechanism and methods for that purpose.

The general object of the invention is to 5 provide for economicallyapplying one, or a plurality of parallel stripes of distinctive color topaperas it comes from, or at a convenient point in its course through,the. paper making machine, without interference l with the normalstructureor operation of the machine, and further to provide, forstriping at the normal speed of the machine so that the rate of outputis not reduced.

The stripes are appliedfor the purpose of producing various decorativeeflects, or more especially, to provide upon the paper a distinctivetrade-mark, consisting of spaced parallel stripes of a color distinctfrom that of the aper. The word color as here used is inclusive of blackand white, and is intended to comprise any suitable pigment forapplication to paper or like materials.

Another object is to provide for applying the stripes by a new andimproved offset method. 4

Another object is to provide for the proper supply of color, whichpreferably includes means for continuously supplying the liquidcoloring, and keeping it constantly in proper condition; and to provideother means for handling the color, as described in detail hereafter.

A more particular object of the invention is to provlde fen applyingcolor by means of capillary wick-strands arranged to draw liquid colorfrom a trough adjacent a roll 'of a paper making machine, thesewickstrands running outward from the trough and lying on a surface ofthe roll anterior to the point of roll contact with the paper web sothat the strands will be straightened by the drag of the roll and thecolor is first ap lied to the roll surface and then to the T b as itpasses in contact with the roll.

The characteristics and advantages of the invention are furthersu'fliciently explained in connection with the following detaildescription of the accompanying drawing, which shows one representativeembodiment of the invention. Afterconsidering this example, skilledpoisons. will understand that many variations may be made, and we contemlate the employment of any structures that are properly within the scopeof the appended claims.

Fig. 1 is a diagrammatic view, partly in elevation and partly insection, of mechanism embodying the invention in one form. Fig. 2 isa'fragmentary plan.

Both views also explain the process forming part of the invention. 1'

The drawing shows diagrammatically, certain rolls 1, 2 and 3, which areweb-operating or directing rolls of a paper machine and may specificallybe one set or a part of a set of drying rolls near the discharge end ofthe machine. The aper web W, which I may be straw board, c ip board ofmoderate thickness, or in fact almost any grade of paper capable ofbeing handled in the described manner, passes in a circuitous course.through the series of rolls and is finally pressed by r0113 againstroll2 as it passes away from this part of the paper machine in the directionindicated by the arrow.

A color trough 4 is supported adjacent roll 3 at the side ahead of rollcontact with the web. This trough is longer than the roll, and desirablyhas an inclined or sloping wall 5 next to the roll, the upper edge orlip 6 of which is usually located at a tangent to and substantiallybelow the upper roll surface. The trough may be relatlvel narrow and maybe located as shown, without in any way interfering with the normalconstruction and operation of the paper machine.

Suit-able color supply means are located at one side of the machine,that is, at a point beyond the ends of rolls 1, 2, 3 or other rolls ofthe machine, so that the color handling means is outside the framelimits of the paper machine and interferes in no way with its normalconstruction and operation. Such means comprises, in the presentexample, the following: A main or storage tank 10 is located at asuitable elevation for gravity feed and supplies a suitable color, whichmay be an aniline ink or dye or almost any other suitable coloringmaterial, under control of a valve 11, to a su ply or mixing tank 12,which is at a suitable elevation for gravity feed to trough to thetrough under control of a valve 14. Communicating with the trough at asuit- 4. A pipe 13 supplies color from tank-12 able level therein, whichdetermines the level of color in the trough, is an overflow pipe 15,this being preferably located near the opposite end of the trough frompipe 13 to provide for circulation of color throughout the length of thetrough. Pipe 15 leads to a centrifugal or other pump 16, driven by amotor 17 or otherwise, and from the pump a return pipe 18 goes to thesupply or mixing tank 12. Desirably, also, a drain pipe19 connects withthe trough at its bottom so that when a valve 20 therein is opened thetrough may be completely drained back to the supply tank.

On the inner face of inclined trough wall 5 is a series of pins or othersuitabl feedstrip holders 25. these being spaced in accordance with thedesired spacing of the stripes. A feed strip or applicator 26 isconnected to each holder. These strips or a plicators may be of anymaterial suita le for drawing color from the trough by capillary action,such as narrow strips of felt or other fabrics. Specifically, we haveemployed for this purpose, single strands of ordinary wool yarn, andthis material is preferred in many cases. When such feed strips are usedthey are easily connected to the holders or pins 25 by simply impalingthe strands of yarn thereon near one end of the strand, which dips intothe color in the trough. The other end of the strand is laid upon thesurface of roll 3 anterior to its point of contact with the web, and inthe rotation of the roll the strand is straightened out by the drag ofthe roll and caused to continuously run true to maintain the properspacing of the strips.

The strands or wicks 26 draw the color from the trough by capillaryaction and apply it to the surface of the roll, by which the color isapplied to the surface of the web in parallel spaced stripes. At thenormal speed of the .pa er machine and with wicks or feed strips 0 thecharacter described, the color is applied at the proper rate for thedesired striping effect, that is, the stripes are of moderate width andthe color dries rapidly and no special provision for drying the color isrequired.

If, for any reason, it is desired to omit striping, an attendant merelywithdraws the wicks from the roll surface byturning them back into thetrough or upon the wall 5 or. lip 6 thereof, and means may be providedfor simultaneously manipulating the wicks, but it is sufficient inpractice to manipulate them individually by a long rod.

The color is continually maintained in condition for use by circulationthrough the trough, as above sufiiciently explained, and wheneverdesired, the trough may be completelv drained for cleaning or change ofcolor by mani ulation of the drain valve 20.

The metho forming part of the invention consists in providing a supplyof liquid color adjacent a roll of a paper machine which specificallymay be a drying roll, supplying one or more stripes of color to the rollat a point anterior to web contact by capillary feed or by the use ofwick or equivalent device, and then bringing the striped face of theroll in contact with the web to imprint the stripe or stripes upon theweb; and it also includes as additional or subordinate features, thecirculation or replenishment of the color supply to maintam it in properquantity and condition, or more specifically. the continuous circulationof color from a supply tank to the trough and continuous return ofexcess color to the supply tan While not absolutely necessary. we preferto apply the stripes to the web W. while the latter is still warm andbefore it has lost the heat imparted thereto by the drying rolls of thepaper making machine, as the heat has a tendency to more quickly set thecolor and a clearer and cleaner stripe results. These results are alsoaided from the fact that the roll 3 is also warm when the color stripesare applied thereto. and there is therefore, little or no tendency forthe stripe to run or spread. The relative arrangement of the colorapplying devices and the rolls 2 and 3, is such that the stripes will bepressed into the web W, continuously as the web is formed and almostimmediately the stripes are applied to the roll 3.

We claim 1. A striping attachment for paper-making machines, adapted tocooperate withone of a pair of plain faced web-finishing rollers of themachine, said attachment comprising a color trough having a lip arrangedadjacent and at a tangent to the periphery of the lowermost of said pairof rollers, and a plurality of wick-strands each having intermediateportion supported by the lip of said trough, and the other end restingupon the periphery of said last-named roller to be straightened by thedrag thereof, the arrangement being such that spaced lines of color willbe applied to the said roller by the said wick-strands to be immediatelytransferred to the paper web passing between the said pair of finishingrollers.

2. A striping attachment for paper-making machines adapted to cooperatewith one of a pair of plain-faced web-finishing rollers of the machine,said attachment comprising a color trough having a lip arranged adjacentand at a tangent to the periphery of the lowermost of said pair ofrollers, a plurality of wick-strand-holding means arranged at regularintervals along the length of the said lip, and a plurality ofwick-strands, each having an intermediate portion supported by the lipof said trough, one end of each strand extending) into the trough andremovably engaged y the said holding means, and the other end restingupon the periphery of said last-named roller prior to its engagementwiththe web and adapted to be straightened by the drag of the roller, thearrangement being such that spaced lines of color will be applied tosaid roller by the said wick strands to be immediately transferred tothe aper web passing between the said web-finishing rollers.

3. A striping attachment for paper-making machines adapted to cooperatewith one of a pair of plain faced web-finishing rollers of the machine,said attachment comprising a color trough having an inclined wallterminating in a lip arranged adjacent and at a tangent to the peripheryof the lower one of said pair of rollers, a plurality of wickstrandholding pins arranged at regular intervals along the length of theinclined wall of the trough, and a plurality of wick strands, eachhaving an intermediate portion supported by the said inclined wall andlip of said trou h, one end of each strand extendin into t e trough andengagedby one of said wick-holding pins, and the other end resting uponthe periphery of said last named roller prior to its engagement with theweb, and adapted to be straightened by the drag of the roller, thearrangement being such that lines of color will be applied to saidroller by the said wick-strands to be immediately transferred to thepaper-web passing between said web-finishing rollers.

4. In combination with a pair of plainfaced web-finishing rollers of apaper-making machine, a striping attachment for applying spaced colorlines to the paper web as it passes between said rollers, saidattachment comprising a color trough having its front wall arrangedadjacent and at a tangent to the periphery of the lowermost of said pairof rollers, and a plurality of color applicators arranged at regularintervals along the front wall of said trough, each applicatorcomprising a strand. of yarn, one end of which extends into the troughand the other end supported upon the periphery of the said last-namedroller and adapted to be straightened by the drag thereof, thearrangement bein such that s aced lines of color will be applied to theperiphery of said roller by the said strands to be immediatelytransferred by the roller to the paper web passing between said pair ofrollers.

Signed at Dayton in the county of Montgome and State of Ohio this 28 dayof June D. 1926.

EDWARD B. WESTON: WILLIAM G. CLARK.

